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Do backface determination and distance calculation for chunks in a single pass.

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This commit is contained in:
UnknownShadow200 2016-08-23 14:43:48 +10:00
parent ae379a85c0
commit 777d3a829b
1 changed files with 11 additions and 14 deletions
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25
ClassicalSharp/Rendering/ChunkSorter.cs
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@ -12,26 +12,19 @@ namespace ClassicalSharp.Renderers {
Vector3I newChunkPos = Vector3I.Floor( cameraPos );
newChunkPos.X = (newChunkPos.X & ~0x0F) + 8;
newChunkPos.Y = (newChunkPos.Y & ~0x0F) + 8;
newChunkPos.Z = (newChunkPos.Z & ~0x0F) + 8;
newChunkPos.Z = (newChunkPos.Z & ~0x0F) + 8;
if( newChunkPos == updater.chunkPos ) return;
ChunkInfo[] chunks = game.MapRenderer.chunks;
int[] distances = updater.distances;
updater.chunkPos = newChunkPos;
for( int i = 0; i < distances.Length; i++ ) {
ChunkInfo info = chunks[i];
distances[i] = Utils.DistanceSquared( info.CentreX, info.CentreY, info.CentreZ,
updater.chunkPos.X, updater.chunkPos.Y, updater.chunkPos.Z );
}
// NOTE: Over 5x faster compared to normal comparison of IComparer<ChunkInfo>.Compare
if( distances.Length > 1 )
QuickSort( distances, chunks, 0, chunks.Length - 1 );
int[] distances = updater.distances;
Vector3I pPos = newChunkPos;
updater.chunkPos = pPos;
for( int i = 0; i < chunks.Length; i++ ) {
ChunkInfo info = chunks[i];
distances[i] = Utils.DistanceSquared( info.CentreX, info.CentreY, info.CentreZ,
pPos.X, pPos.Y, pPos.Z );
int dX1 = (info.CentreX - 8) - pPos.X, dX2 = (info.CentreX + 8) - pPos.X;
int dY1 = (info.CentreY - 8) - pPos.Y, dY2 = (info.CentreY + 8) - pPos.Y;
int dZ1 = (info.CentreZ - 8) - pPos.Z, dZ2 = (info.CentreZ + 8) - pPos.Z;
@ -44,6 +37,10 @@ namespace ClassicalSharp.Renderers {
info.DrawBottom = !(dY1 <= 0 && dY2 <= 0);
info.DrawTop = !(dY1 >= 0 && dY2 >= 0);
}
// NOTE: Over 5x faster compared to normal comparison of IComparer<ChunkInfo>.Compare
if( distances.Length > 1 )
QuickSort( distances, chunks, 0, chunks.Length - 1 );
updater.ResetUsedFlags();
//SimpleOcclusionCulling();
}